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Model Pricing

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K3 Series Models

Note: Cache Write refers to the cost of writing request prefixes into the context cache. The Kimi API automatically caches repeated request prefixes, and cache entries come in two time-to-live (TTL) tiers — 5min and 1h. If no TTL is specified, the 5min tier applies by default. Input that hits the cache within its lifetime is billed only at the Cached Input Price: each hit automatically refreshes the cache entry’s lifetime, with no additional cache write charge.

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K2 Series Models

Here, 1M = 1,000,000. The prices in the table represent the cost per 1M tokens consumed. Explanation: Prices exclude applicable taxes. Specific tax obligations are subject to local tax regulations and will be calculated at checkout based on your jurisdiction.

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Concepts

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Billing Unit

Token: A token represents a common sequence of characters. The number of tokens used for each English character may vary. For example, a single character like “antidisestablishmentarianism” might be broken down into several tokens, while a short and common phrase like “word” might use just one token. Generally speaking, for a typical English text, 1 token is roughly equivalent to 3-4 English characters. The exact number of tokens generated by each call can be obtained through the Token Calculation API.

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Billing Logic

Model inference APIs bill both Input and Output based on usage. For K3 series models, cache writes are billed separately per TTL tier (5min / 1h); cached input is billed at the cache-hit price only, with no additional cache write charge. If you upload and extract content from a document and then pass the extracted content as Input to the model, the document content will also be billed based on usage. File-related APIs (file content extraction and file storage) are temporarily free: if you only upload and extract a document, the file APIs themselves incur no charges.

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Model Notes

See each model’s guide for capabilities and recommended use cases: